Anyone can recommend Indemnity Insurance providers?

As the title suggest, I'm looking to obtain indemnity insurance on a property purchase with lack of paperwork given it's an old property, for example, FENSA documentation, lack of planning and building regulation consent, and electrical safety certificate.

Where can I get this one off indemnity insurance as whenever I Google this, it takes me to Home/Building insurance or Commercial indemnity insurance but nothing for residential?